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Old 05-01-2010, 01:11 AM   #1
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My '76 Columbia 9.6 has 2000 series Volvo -Penta, boat is under powered I've read and I don't know how to start this thing if it even runs. It seems to turn over to easy, like no compression, so should I invest in trying to sell this dinosaur? Does anybody want it?boat4.jpg
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Old 05-01-2010, 07:12 AM   #2
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Originally Posted by woodymr' date='01 May 2010 - 08:11 AM View Post

My '76 Columbia 9.6 has 2000 series Volvo -Penta, boat is under powered I've read and I don't know how to start this thing if it even runs. It seems to turn over to easy, like no compression, so should I invest in trying to sell this dinosaur? Does anybody want it?Attachment 1346
Had a look at the schematic for this 10 hp engine, but could not find info on faults in this model.

As this engine is started by hand cranking - it may have a decompression lever, which is depressed while you build up the cranking speed, once this is achieved, the lever is released and the piston on its compression stroke with valves closed, compresses the diesel/air mixture and the cylinder fires and way she goes.

So before you sell it - look for a decompression lever.

Another reason to repower is the extraordinary cost of spares for Volvos.
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Old 05-09-2010, 07:38 AM   #3
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Originally Posted by MMNETSEA' date='01 May 2010 - 02:12 AM View Post

Had a look at the schematic for this 10 hp engine, but could not find info on faults in this model.

As this engine is started by hand cranking - it may have a decompression lever, which is depressed while you build up the cranking speed, once this is achieved, the lever is released and the piston on its compression stroke with valves closed, compresses the diesel/air mixture and the cylinder fires and way she goes.

So before you sell it - look for a decompression lever.

Another reason to repower is the extraordinary cost of spares for Volvos.
Thanks for reply, This engine does not have a decompression lever, and it has electric starter but just turns over and over, have bled fuel lines to best of ability, maybe take off head and look for gasket leak? How would I test compression without removing injector?, then sleeve comes out and I'm screwed according to manual info. Engine is MD6B I've been told it is a rare model.....
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Old 05-02-2011, 01:48 PM   #4
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Thanks for reply, This engine does not have a decompression lever, and it has electric starter but just turns over and over, have bled fuel lines to best of ability, maybe take off head and look for gasket leak? How would I test compression without removing injector?, then sleeve comes out and I'm screwed according to manual info. Engine is MD6B I've been told it is a rare model.....
Here is a picture of the MD6B taken from the manual. Decompression lever is shown at number 11 and this should be down for the engine to withold compression. One thing to consider before replacing this engine is that it is riggidly fitted so for a replacement add all moving engine mountings and shaft fittings. The MD6B is a low rev heavy duty dependable engine fitted to heavy Carter sailboats (4500+ kg) and many Scandinavian heavy boats.Volvo_Penta_MD6B.jpg
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